Natural Hazards and Earth System Sciences
Natural Hazards and Earth System Sciences
NHESS
Articles | Volume 26, issue 11
Articles | Volume 26, issue 11
https://doi.org/10.5194/nhess-26-5769-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-26-5769-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 11
Research article
 | 
13 Nov 2026
Research article |  | 13 Nov 2026

The operational 3DEnVar data assimilation scheme for the Météo-France convective scale model AROME-France

Pierre Brousseau, Valérie Vogt, Etienne Arbogast, Maud Martet, Guillaume Thomas, and Loïk Berre

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Latest update: 13 Nov 2026
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Short summary
Since October 2024, the Météo-France operational convective scale model AROME-France uses a three-dimensional ensemble-based variational data assimilation system. This allows observations to be spatialised in a flow-dependent way, leading to improved initial conditions. Numerous sensitivity studies allowed to configure this scheme in an operational context. Major positive impacts on the forecast quality have been demonstrated over a long period and on several severe meteorological situations.
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